William cooper



(No Model.)

W. COOPER.

VBNTILATOR FOR BUILDINGS.

Patented NOV. 30, 1897.

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UNITED STAT-Es* PATENT"- wrLLIAM coornn, on FARNwonTr-I, ENGLAND.

VENTILATORFOR BUILDINGS.

SPECIFICATION forming part of LettersPatent No. 594,727, dated November30, 1897. Application filed December 28,1896. Serial No. 617,225. (Nomodel.) Patented in England July 22, 1893,1lo.14,192.

` the following is a full and exact description thereof.

The nature of my invention consists in fitting two or more hinged orpivoted iiaps coupled together by levers, rods, or other equivalents, sothat their action will be synchronal. The flaps are so proportioned andarranged as to be almost balanced, by which their toand-fro actions willbe effected with the least possible current of air. The flaps may be ofequal or unequal sizes, the movements being effected by means of leversand rods of suitable proportions. The whole arrangement may be mountedin a frame or otherwise, as required; and in order. that my said.invention may be particularly described and ascertained reference ishereby made to the accompanying drawings, in which similar figures ofreference indicate corresponding parts.

Figure 1 is a sectional elevation illustrating one means of carrying outmy invention, showing the flaps closed. Fig. 2 is a sectional elevationof the arrangement shown in Fig. 1, showing the flaps open. Figs. 3 and4 illustrate another form of carrying out myinvention, Fig. 3 showingthe flaps closed and Fig. 4 showing them open. Figs. 5 and 6 illustrateanother modification.

Referring to Figs. 1 and 2, 5 is the upper flap, hinged at 6, and 7 isthelower iap,hinged at 3. 9 is a bracket or arm rigidly iiXed to thetiap 7. l0 is a connecting-rod one end of which is pivoted to 5 at 11,the other end being pivoted to the bracket-arm 9 at 12. The positions ofJ[he pivoted centers 1l 12 and the curves traversed thereby relativelyto each other and to the centers Gand 8 are such that the two naps 5 and7 very nearly balance each other, so that even a weak current of air inthe direction of the arrow 13 will instantly close the flaps, as shownin Fig. l, and a similar current of air in the direction of the arrow 14will instantly openthe flaps, as shown in Fig. 2.

Referring to Figs. 3 and 4,the position of the connections is shownreversed, the bracket 9 is rigidly fixed to the upper flap 5, andacurved connecting-rod 10 is pivoted to the flap 7 and arm 9, as shown.The effect of this arrangement is exactly similar to that shown by Figs.1 and 2, the iiaps very nearly balancing each other.` 15 is a transversebar fitted with an elastic facing 1G, against which the turned edges 17of the flaps impinge and render the joint airtight when the iiaps areclosed. These turned edges and elastic facings are also provided at thesides for the same purpose.

By slight alterations of the centers upon which the several elementsforming the kinematic chain revolve the flaps maybe arranged so as onlyto partly close to a certain set open position. Thus if the center S isshifted to the point 18 or between 8 and 18 the fiaps will not entirelyclose the passage, but will remain partly open.

Referring to Figs. 5 and 6, 19 is a fixed guide-rod,which serves as aguide to the slideblock 20. This slide-block carries the pivoted ends oftwo connecting-rods 21 22, the other ends of the'rods being pivoted tothe flaps 5 and 7, whereby the angularmotions of the flaps are renderedsynchronal. The rod 19 may be screw-threaded to receive a screw-nut, orit may be a ratchet-bar to receive a pawl, or a bar formed withpin-holes for the purpose of setting open the flaps, if required. It isevident that the pivotal points or distances between the same can bechanged or varied.

Having now particularly described and ascertained the natu re of my saidinvention and in what manner the same is to be performed, I declare thatwhat I claim is- 1. The combination with an air or ventilating shaft orpassage-way, of a draft-regulator comprising,oppositely-arranged flaps,and a jointed connection between the flaps.

2. The combination with a ventilatin g-shaf t or passage-way, of adraft-regulator comprising oppositely-arran'ged flaps, and a pivoted andjointed link connection between the iiaps.

' 3. An automatic draft-regulator for ventilators, comprisingoppositely-swinging flaps or doors, and a jointed balancing connectionbetween the iiaps or doors.

IOO

4. A draft-regulator for ventilators, comprisin g oppositely-swingin giaps or doors,and a connection between the flaps consisting of arms oneof which is iiXedly secured to one door, and the other pivotally securedto the other door, one of said arms beinglon ger than the other, and apivotal connection between the arms.

5. An automatic draft-regulator for Ventilators consisting ofoppositely-swingin g aps or doors, a fixed arm on one flap, and aconnection between the arm and opposite iap.

G. An automatic draft-regulator for ventilators, consisting of hingedflaps oppositely arranged, and means for uniting and balancing the flapscomprising arms and a joint connection between the arms, substantiallyas described.

7. An automatic draft-regulator for Ventilators, consisting ofoppositely-swinging pivotal flaps, and an eccentrically-jointed barconnection between the flaps.

8. Ail automatic draft-equalizer, comprising oppositely-swinging iiaps,of means for connecting and balancing the flaps, and adj ustable meansfor Varyin g the movement of the flaps to permit the same to eitherpartially or fully close the Ventilating-opening.

9. An automatic draft-equalizer for Ventilators, consisting ofoppositely-arranged flaps or doors suitably hinged to move in oppositedirections, a jointed connection between the flaps, and means foradjusting the hinged connection of one of the iiaps.

In testimony whereof I ai'iiX my signature in presence of two witnesses.

VVILLIAIWI COOPER. IVitn esses ARTHUR C. HALL, JOHN WV. THOMAS.

